What Problems Should I Look For on My Truck?
Q. I have an older Chevy truck with a 350 engine and spark plugs six and eight get oil fouled. What problems am I looking for?
A. It is not uncommon on this engine to see valve guide wear; as the valve guides wear, oil is sucked by the valve seals and ends up in the combustion chamber. I would perform a compression test on the engine; if the compression is low in those two cylinders, you may be faced with an engine overhaul. In the short term, you could put in a slightly hotter spark plug or even a spark plug anti-fouler. The anti-fouler would solve the oil consumption problem and will keep the plug clean and the engine from skipping.
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